jmdaweb/nvdaremoteserver — reverse-engineered prompt

Build me a self hosted NVDA Remote relay server that works like the public relay servers, so I can use NVDA Remote with my own server and reach multiple computers from outside my home without having to expose the same port on each one. I want it to run on the main desktop platforms and common Linux setups, and it should be easy to install, start, stop, restart, and run in a debug mode when I need to see errors.

Please include a simple config file with a sensible default port, make sure it can run as a background service where that makes sense, and keep the setup practical for real use, including firewall and certificate handling if needed. If possible, also make it easy to run in Docker for people who prefer that.

I am not looking for a fancy UI, just a reliable relay server with clear instructions so someone lightly technical can get it running. You can look up current docs online if you need to.